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Sludge - Slurry Dewatering Solutions & Filter Press Technology |
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Diemme has the correct solutions for all problems of slurry - sludge dewatering, because every DIEMME filter press, is projected in connection with the chemical physical characteristics of the sludge. |
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Abrasives Slurry Dewatering |
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In the mining sector (for example Cu, Zn, Pb, Fe etc… concentrates) the slurry to be filtered has usually a high abrasive property, a very good filterability and a high feed rate, due to the high concentration. The picture shows a membrane filter press model GHT 4X4 - 1500 installed in Russia, for the filtration of concentrates from flotation in a gold refining and beneficiation plant. |
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Corrosives Sludge Dewatering |
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When metals are refined, it is necessary to treat suspensions with very low pH values. In those cases DIEMME Filtration designs filter presses makes some additional adaptations. The picture shows, the filter press GHT 4X4 - 1200 with polypropylene piping and, a membrane filter press model KE 500 with polypropylene linings. These filter presses which are installed in South Africa, are treating sludge coming from the leaching of raw material containing platinum, palladium, rhodium, gold, nickel, copper and ruthenium, with hydrochloric acid. |
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High Temperature Sludge Dewatering |
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When treating very viscous products (for example in oily phase) filtration takes place at high temperatures (>100°C). The picture shows a membrane filter model ME 800 press installed in France, for the hot purification of three different kinds of polyoils, each with different process viscosity and temperature. |
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In the case of filtration of sludges containing toxic substance, there is a possibility that harmful fumes could be released. For this application DIEMME Filtration isolates the filter press from the surrounding environment by means of suction hoods, which convey fumes away from the operator’s working area. The picture shows a membrane filter press model KE 630 equipped with suction hood which is installed in Russia, for the treatment of fumes containing arsenic in a copper refining and fusion plant. Arsenic in a dilute solution is made to precipitate as sulphide and the resulting sludge is filtered. |
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Explosive Slurry Dewatering |
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Filter presses working in the chemical, petrochemical and pharmaceutical sectors must often be equipped to work in zones classified as explosion risk areas. The picture shows a membrane filter press model AUTOMAT 800 that is installed in Italy, for the sludge dewatering of crystallized medicine suspended in pure acetone. Both the washing and drying phases for the acetone recovery are carried out inside the filter press. |
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Low Concentration Sludge Dewatering |
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In case of "polishing", when the product to be filtered has a very low suspended solids concentration, the main objective is to obtain an extremely pure filtrate.The picture shows a "plate and frame" filter press model KE 630 of AISI 316 stainless steel and paper filtering elements that is installed in Australia, for the purification of additives in a PVC (Polyvinyl chloride) production plant. |
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Low Temperature Sludge Dewatering |
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In the food industry, it is often necessary to filter products at a low temperature.The picture shows a membrane filter press model ME 1000 installed in Spain, for the filtration of alcoholised white wine with potassium bitartrate in suspension. The product enters the filter press at the temperature of -13°C and comes out at the temperature of -7°C. The filter press is manufactured with materials in conformity with FDA (Food and Drug Administration) rules. |
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Colloids Sludge Dewatering |
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To treat products with very low filterability and when detachment from the filter cloth is difficult, DIEMME Filtration manufactures a highly innovative filter press - the JETFILTER - with the following characteristics: feeding "plate by plate" by means of injectors, reduced chamber thickness, simultaneous plate pack opening and cloth moving from top to bottom for cake discharge, cleaning bar to assure the automatic cake discharge from the cloths and Washing bar with high pressure water, to eliminate any eventual cake residual from the cloths. The filter press shows filter press model JETFILTER RH70 installed in Italy, for the filtration of ceramic barbotines. |
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